Sand-mixing machine



July 17,1928. 1,677,619

R. H. CLEMINSHAW SANDL MIXING nomma Filed March 17. 1927 y Patented July 17, 1928.

unirse -fsir Harem RUSSELL. H.' CLEMINSHAWylOFgSHAKER HEIGHTS, OHIO, ASSIGNOR TOTHELCLEYE- LAND ELECTRIC MOTOR COMPANY, OF .'CLEYELAND', OHIO, .A .CORPORATION OF sA',ivn-iviixiiaa` MACHINE.

. Application led March 171927. Serial No. 1f-6,011. Y

is adapted to pile the samein a restrictedy -Space .whenfthe floor -space vis requiredfor other purposes.

Sand mixing machines, sometimes desigr i nated sand cutting machines, 'of const-ruction similar tofthatherein described,j!have heretofore beenused,` but in most instances the mixing cylinder drive of such machines Vhas been by means 'of worm gears or through.v

rl a *beveled-drive, ywherein a speed reduction because of the great stresses which vocca-A .20

j fromthe motor'wasprovided'for. j In suchv` constructions,however, 'the drive is irrei versible and'v frequent breakage 'ofthe .gear vteeth and driving mechanismhas resulted sionally areplaced upoiijthe cutter when hardened areasoifl foreign-matter are encountered ,inthe sand pi-le.

The present .invention has for its'p'rinci- 'pal object a construct-ion 'which will' readily of the mixing meansV 'withoutv causing;` any harm to the mechanism. 'l This functionfis"V accomplished by ,connecting the driving mo- ,tondirectly with the-sand lmixing member 'through sprocketwlieels of .suitablediam-y eter to provide fornecess'aryjgearl reduction,V

thus permitting unusual stresses applied to the mixingmember to be transmitted direct- .ly to thearmaturen shaft of the motor, which,

as will be understood, may turn freely and to they mechanism.

Another object of the invent-ion yis to provide a central drive for the mixing cylinder which may be enclosed to prevent the en,- trance of grit. Another object of the invention is to provide a central member of plowlike shape which will serve to form a cen-` absorb unusual shocks4 or :stresses yimposedv A ,upon the mixing memberby transmitting'the" strains along 'thedriving means', to the mo- 1 tor and permitting thefstoppage or reversal which switch Will prevent injury to tliemotor when the mixingl cylinder is suddenly stoppedcas by encounteringforeign matteror an area ofhard sand. Otherrand further objects. of the invention will appear'in the course 'of the| following.description.

To the accomplishment ofthefforeigoing and related ends, said invention,v thenconvs ists of the means hereinafter fullydescribed and particularly pointed out in the `claims. AThe annexed'drawingy andthe'following description set 'forthin detail. certain'mechanism embodying the invention, such disclosed means constituting, however, but one 'of var-V ious mechanical forms; in fwhich ftheprincipleL of .the invention may be used. l

" In said. annexed drawing: Y

Fig. l-of theydrawing isy a 'front elevation showing a sand mixing machine embodying the principles of my invention; Fig."2 is a .side elevation .of ,the machine shown in Fig. `1; and F ig. y3 is a diagrammatic view Vof the motor circuit includingan overload switchas usedfwith said apparatus.

.",Asgis clearly. :shown in Vthedravving, Ythe sand mixing apparatus comprises a frame 1 'supported kupon a.y pair` of' .large driving wheels'jfl at vits/forward end. and liavinga .pair of small sized wheels Bjatits rearward Y end', each independently mounted inl a swivelling support' 4 to permit'the same to actin the manner `of casters.' v y i j v'The frame carries at' itsvv rearward 'end' a platform 5 upon. which driving mechanism forthe respective drive wheels is mounted Each ,wheelis preferably provided with an individual ,motor asy is more particularly .described in a companion.applicationfEach maybe-,stopped or reversed'without damage .,QIIl'Ot'QIj (ifthrough suitableA gearing? drives a countershaft 8 upon lthe endet-which a driving pinion 9 is mounted. The pinion, l

engages internal-gear teeth 11 upon the drivv ing wheel. Through suitable controlling means (not shown) the driving wheels may be simultaneously or individually operated thus permittingthemachine to be turned or maneuvered as desired.

The forward end of the platform is provided with journals 12 within which the axle 13 of the driving wheelsis received. Upon the central portion of said axle, a. sleeve 14 is mounted, which sleevehaa an ujgiwardly projecting arm adapted to support the motor 16' for driving the mixing cylinder. rl`he sleeve also carries arms 17 at itsv eX- treme ends extending'downwardly and pro-l vided at the freeends with ournals 18 within which the shaft 19 of the mixing cylinder 20 is mounted.

Centrally of the mixing cylinder shaft, a

`sprocket wheel 21 is provided, said sprocket wheel being ot suitable size relative' to a similar sprocket wheel 22 on the shaft of the driving motor to provide for a suitable gear reduction. A sprocket chain 23 connects the respective sprocket wheelsy and enclosed in a dust-proof casing 2-1.v The lower end of the casing is preterably provided with a sharpened edge 25 which may readily enterv the sand heap withoutcausing The casing itself is made undue friction. of very narrow width in order to present no Vobstruction to the apparatus being moved through a sand pile. The casing is in el'l'ec-t a central plow and is adapted to be ftoreed through the sand pile and foi-in a central furrow. This'action serves to preventthe accumulation oit an Xcess quantity of sand at a central point.

It will be noted, particularly from Fig.

2, that the driving motor lor the mixing cylinder is swung in a position slightly rearward'ot a *drivingv shaft which thus permits the motor'to serve asacounterbalance `for the mixing cylinder.

As has Ybeen indicated, the apparatus is' moved trom point topointby means oi the driving motors and an independenty motor serves to drive the mixing cylinder.

formsno part of the present invention which as has beenindicated relates to the means to relieve the apparatus from shock or injury when unusual conditions are encountered. A i

It will be obvious yfrom the construction above described that` -wh'ent-he iniXingniem-- ber meets with resistance that thestrain will Y be- Happlied to the sprocket Vwheels v Vand circuits vwith like eect.

The) i power isobtained iirom the usual lighting' terminals and is carried to the machine by" 'means ot' a flexible cable (not shown) vdetails ot' the power mechanism tor the driving wheels as heretofore stated is the sulo-y i iject matter of a separate application vand sprocket chain and transmitted directly to the armature shaft of the drivino motor.

Inasmuch as no irreversible or slowly acting l gearing is interposedv the armature will be retarded, stopped or reversed, but' no breakage will occur. The motor construction is such that the stopping ot thearmature or the reversal olithe s'an'iebrings about no undue harmt'ul eifects and thus all shocks are taken up and all danger of breakage of the driving mechanism is obviated.

Through the use of an overload Yswitch 31,Y

" The switch has been illustrated as'used inV a three-phase alternating current line but it is obvious thatit could alsobe used iii other Other modes ol applying the principle of my invention may be employed instead of.

those explained, change being madeas i'egai'ds the mechanism herein disclosed', provided the'means `stated by any of the tollowing claims or' the equivalentot such stated means be employed. Y

` I therefore particularly point outfand dis-` tinctly claim asmy invention:

A y1. AnA apparatus of the character described having in combination a wheeled.' support, a

sand mixing cylinder mounted on said sup-V port, a central drive tor saidcylinder, an enclosing casing torrsaid drive, said enclosto provide a sand disv jibuting member. l

2. An apparatus ot he charaeterdescribed having in combination a wheeledsupport, a sand mixing cylinder'mounted on said support, and non-rotatable'means engaged cen trally with said mixing' cylinder andpro- `jecting downwardly to 'provide a sand dis tributincf means centrall'fV of said cylinder.

Signed by me this 12th Vday of'Marcli, 1927. i i v' RUSSELL ii. 'oLirMiNsi-iavv 

